BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment from part, supplier, partsupp, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and p_size = 46 and p_type like '%BRASS' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' and ps_supplycost = ( select min(ps_supplycost) from partsupp, supplier, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=821968.20..821968.20 rows=1 width=190) (actual time=9756.111..9756.133 rows=100 loops=1) Buffers: shared hit=1820557 read=58088 written=684 -> Sort (cost=821968.20..821968.20 rows=1 width=190) (actual time=9756.108..9756.119 rows=100 loops=1) Sort Key: public.supplier.s_acctbal, public.nation.n_name, public.supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1820557 read=58088 written=684 -> Merge Join (cost=395548.83..821968.19 rows=1 width=190) (actual time=6468.377..9749.305 rows=4755 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1698 Buffers: shared hit=1820549 read=58088 written=684 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7919 width=30) (actual time=0.166..1424.350 rows=8044 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 46)) Rows Removed by Filter: 1991956 Buffers: shared hit=9995 read=36746 written=618 -> Sort (cost=395548.83..399548.83 rows=1600000 width=168) (actual time=6465.278..7097.413 rows=1602905 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1652140 read=17542 -> Nested Loop (cost=1.56..230671.71 rows=1600000 width=168) (actual time=0.105..4157.702 rows=1602960 loops=1) Buffers: shared hit=1652140 read=17542 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.057..126.235 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.011 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.041..108.224 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.006..41.137 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 2kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.003..0.006 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.00..10.44 rows=80 width=12) (actual time=0.016..0.181 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1649959 read=17542 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.072..0.072 rows=1 loops=6453) Buffers: shared hit=158414 read=3800 written=66 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.047..0.069 rows=2 loops=6453) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158414 read=3800 written=66 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6453) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6453 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.032..0.065 rows=4 loops=6453) Buffers: shared hit=151961 read=3800 written=66 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.029..0.053 rows=4 loops=6453) Buffers: shared hit=100337 read=3800 written=66 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.020..0.021 rows=4 loops=6453) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22792 read=3800 written=66 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=25812) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77545 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=25812) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51624 Total runtime: 9813.059 ms (67 rows) COMMIT; COMMIT